package com.healer.hungery.config;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration // 配置
@EnableBatchProcessing // 执行批处理
public class JobConfiguration {

    // 注入创建任务对象的对象
    @Autowired
    private JobBuilderFactory jobBuilderFactory;

    // 任务的执行由Step决定
    // 注入创建step对象的对象
    @Autowired
    private StepBuilderFactory stepBuilderFactory;

    // 创建任务对象
    @Bean
    public Job HelloWorldJob() {

        return jobBuilderFactory.get("HelloWorldJob").start(step()).build();
    }

    @Bean
    public Step step() {
        return stepBuilderFactory.get("step").tasklet(new Tasklet() {
            @Override
            public RepeatStatus execute(StepContribution stepContribution, ChunkContext chunkContext) throws Exception {
                System.out.println("hello world!");
                return RepeatStatus.FINISHED;// 只有它结束了，后面的才能执行
            }
        }).build();
    }
}
